Multiprocessor systems, shared variables updating device, processor unit and shared variable update method

摘要

PURPOSE: To suppress an unnecessary communication and to improve the processing speed in a multiprocessor processing system by performing remote memory operation by communication processing at the less frequency between frequencies of occurrence of 'reference'k and 'rewriting'. ;CONSTITUTION: A parallel processing system wherein processor elements 2a, 3b, and 2c share variables through remote operations is constituted. At this time, shared variable 10 are arranged in the local memories 5 of the individual processor element 2 respectively and the local memories are referred to. The shared variables 10 are rewritten by a communication and when the generation time interval of a communication for the rewriting is shorter than a prescribed value, ΔT measuring circuit 8 sets a delay response flag, so that a delay mode is entered. At this time, the communication is delayed until the shared variables are referred to, and then carried out.;COPYRIGHT: (C)1994,JPO&Japio